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ddd [48]
3 years ago
5

Why do the plants at the bottom of a pond grow better than plant on the bottom of a lake

Physics
1 answer:
yuradex [85]3 years ago
8 0
Because pond water is the most freshest water than lake water
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A beam of unpolarized light shines on a stack of five ideal polarizers, set up so that the angles between the polarization axes
ddd [48]

Answer:

21.75

Explanation:

n = number of polarizers through which light pass through = 5

\theta = Angle between each pair of adjacent polarizers

I_{o} = Intensity of unpolarized light

I_{n} = Intensity of transmitted beam after passing all polarizers

It is given that

\frac{I_{n}}{I_{o}}= 0.277

we know that the intensity of light after passing through "n" polarizers is given as

I_{n} = (0.5) I_{o} Cos^{2n-2}\theta

\frac{I_{n}}{I_{o}} = (0.5) Cos^{2n-2}\theta

inserting the values

0.277 = (0.5)Cos^{2(5)-2}\theta

0.554 = Cos^{8}\theta

Cos\theta = 0.9288

\theta = Cos^{-1}(0.9288)

\theta = 21.75

7 0
3 years ago
Low-mass and medium-mass stars eventually
Mkey [24]
The answer is
D. turn into white dwarfs

3 0
3 years ago
A satellite is in a circular orbit around the Earth at an altitude of 3.18x10 m. Find the period and th orbital speed of the sat
Leona [35]

Answer:

112.17 m/s

56.427 years

Explanation:

h = 3.18 x 10^10 m

R = 6.4 x 10^6 m

r = R + h = 3.18064 x 10^10 m

M = 6 x 10^24 kg

The formula for the orbital velocity is given by

v = \sqrt{\frac{G M }{r}}

v = \sqrt{\frac{6.67 \times 10^{-11}\times 6\times 10^{24}  }{3.18064\times 10^{10}}}

v = 112.17 m/s

Orbital period, T = 2 x 3.14 x 3.18064 x 10^10 / 112.17

T = 0.178 x 10^10 s

T = 56.427 years

8 0
3 years ago
How much is the plane's acceleration while breaking if it takes 15 s for its velocity
Marizza181 [45]

Answer:

A. 4.67 m/s²

Explanation:

u = 145 m/s

v = 75 m/s

t = 15 s

a = v - u / t

= 145 - 75 / 15

= 4.67 m/s²

Hope this helped...

7 0
3 years ago
Please answer quick for brainlist ; )
balandron [24]

Answer:

The diagram assigned B

explanation:

Check the direction of the two vectors, their resultant must be in the same direction.

7 0
2 years ago
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